I was thinking about how the bending actually took place from a scientific point of view. It reminded me of something I thought about a few weeks ago and had forgotten. So, now that I remember, I wanted to share my possible 'theory of elemental bending'.

I had the idea that the benders were actually 'channeling' thought to manipulate the elemental atoms. I'll explain some of this theory using waterbending. A waterbender is able to manipulate the hydrogen and oxygen atoms in water. However, unlike the airbender, the waterbender is only able to manipulate these two elements when the two elements are in the complex form of H2O. Like all elemental benders, the waterbender has the ability to excite or stabilize the individual atoms electrons, thus either creating a gas or a solid. (steam and ice for the waterbender) If we assume that the waterbender can control other 'natural' liquid elements, then mercury could be the waterbenders best friend. Imagine if Katara carried around a vile of mercury, instead of the little vile of water. She could shape small cones of mercury at her targets. It's heavy weight would make it much more difficult to stop than water.

Anyway, that's my crazy theory. It's pretty deep though. lol

I guess not, waterbenders can only control H2O not Hg.

i has a similar thought about his . WHen an earth ebdner bends a block out of the ground is there a holloq area under the ground friom wheree he has taken it or has he jsut made it less dense?

as other's have stated, it's fictional television show.

Fire is just the ignited gas of something. With a woodfire, the fire is actually made of wood. Firebenders just make fire appear in mid air, so technically, they are bending air.